Speaker
Description
The bound system of a deuteron and its antiparticle (deuteronium) appears to be an almost ideal candidate for the study of higher-order corrections to the electromagnetic interactions of spin-1 particles. As shown in the preprints arXiv:2506.15974 and arXiv:2602.04743 (accepted for publication in Physical Review Research and Physical Review D), the fine and hyperfine structure of deuteronium give access to interesting interconnections of spin-dependent effects, angular mixing, and scalar as well as tensor polarizabilities. The bound system is essentially stable and could be explored at a future antideuteron beam facility. Due to the extreme field strengths commensurate with the small generalized Bohr radius, the deuteronium system is a good candidate for the detection of small residual dark-photon interactions coupling to neutrons (and their antiparticles).